Kiln



D. R. BREWSTER Feb. 24, 1925 KILN Filed March 12',y 1924 3 Sheets-Sheet a ATTORNEYS.

Feb. 24, 1925- 1,527,955

D. R. BREWSTER KILN Filed March 12, 1924 s sheets-sheet 5 Il v 10 IN VEN TOR.

Dona d/ R. Bren/.5 er,

ATTRNEYS.

sanare Feb. 24, 1925.

unirse isTAras PATENT oFFlcE.

:DONALD E. BBEWSTEB., F INCINNATI, OHIO, ASSIGNR TQ THE STANDARD DRY XILN COMPANY, F INDIANAPOLIS, INDIANA, CORPORATION OF INDIANA.

.ippneauqn mea march izfizar serial np. 898,648.

To allen/hom it may concern: y Be it known that I, DONALD R. BaEwsTnn, a citizen of the United States, residing at Cincinnathin the county of Hamilton and State 'of Ohio, have invented a new and useful improvement in Kilns, of whiclft lowing is a specication.

My invention relates-to improvements vin dryinmchambers, and particularly to charnbers i'or drying lumber, and other forest product, clay products, etc.

Une of tlieobjects of myV invention is to .pro'videa drying chamber in which the heat may be evenlyv distributed throughout the l5 entire chamber and in which the temperature and humidity at all points of the chaluber may be .maintained equal it desiredor, itdesired, the temperature and `humidity each may be varied for diterent portions ot 2G the chamber, depending upon necessitating conditions.` Y

Another object of my invention is to provide a Adrying chamber having an increased capacity for a given space. a5

is to provide a drying chamber wherein the circulation of drying air through the stackskl of material is increased and wherein such circulation may he controlled for eachl stack of material.

For the purpose of disclosing my4 invention l have illustrated in the accompanying l drawings, certain embodiments thereof. ln said drawings,

Fig. l vis a perspective view of a lumber .drying kiln embodying my invention Fig. 2 is a longitudinal section thereof',

taken substantially through the center or' one i'ication.

In the 4embodiment illustrated, I have shown, in Fig. 1,' a perspective view oi' a twov 1 chamber drying apparatus. As each charm ber is"constructed the same, it will only be .50 .necessary to describe the construction and arrange1n-4n'1t of one chamber.

.As s'hivm'the chamber l, is provided with the. usualroof 2 and hasdoor's arranged at each end ot the chamber to permit the inser- -phere at the top. Arranged longitudinally 'of' each chamber are tracks 5 on which are ,adapted to travel, the loadearryine fol-- 'steam jet pipes are all arranged, the tracks prisesa plurality of radiatorunits 8 which the kiln chamberv and in each grou there is And still another objectxol my invention tion of the lumber inone-end .and removal ot the lumber from the otherV end. Each room is provided with air lines, or chimneys,- 3, whichcommunicate at their bottom, as at 4, with the-chamber and open to the atmostrucks 6. Beneath these tracksv is arrange the radiator pit, in'which the heating pipes and 05 being supported above the pipes on suitable standards or uprights- 7. y

The heating medium for the chamber comare spaced apart' from one another longitwl 70 dinally yof the'chambento form between the units, down draft flue-ways 9. Each radiatonunit preferably comprises a group of steam pipes l0 which extend transversely of a series of pipes arranged one a ove the4 other' and connected at each endwith'return bends or` elbows l1 to forni practically a series of coils arranged side by side. The up per end of the coil is connected to a. supply header l2and the opposite end of the coil, at the bottom,`is connected to a return header 13. ilach of these supply and return headv ers is connected, respectively, by al supply pipe '1.4 and return pipe l5 to a main supply 16 and main return 17 rovided With the usual steam traps, etc. ach of the supply Pipes 'ift is plOVided with a control valve 18' 'Y for controlling the admissionof steam to the individual radiator units and likewise, each of the `return pip es l5"isprovided with a control valve 19.l In each of the flue Ways between the radiator units and extending transversely of the chamber, is mounted a steam pipe 20 having 95 at suitable intervals, openings 21 on its under side to form a series ofjet nozzles arranged to vproject the steam downwardly toward the bottom of ther chamber. Each of these pipes is connected by a supply pipe 22, 10o with a source of steam supply and is provided with a hand valve 23.. A second steaml jet pipe 24; for each radiator unit is ar" ranged y transversely jof the' chamber and above the unit. This pipe is provided with openings 25 forming j'et nozzles arranged to' project the steam j et upwardly. and this pipe 1s likewise connected withv a suitable source' lll outlet opening of steam supply and provided with a hand valve 26. 4

At each end of' the chamber there also provided,l small warming radiator units 27 and 28,y constructed similarly to the main radiator units, but preferably haring a fewer number et coils and the supply and return headers are "each provided with a supply pipe 29 and return pipe 30 connected, respectively7 with the supply main .le and with the return main .i7 and provided respectively, with controlling valves 3l and 32. i

fait the bottom of the radiator pit and at one side thereof, there is provided an air flue 33 'extending the length of the eliaml'ier and having opposite each radiator unit, an 34. .d'steam supply pipe entends the length of thisl flue and is provided with jet nozzles 36, one 'jor each ot the openings 34:, Ywhich nozzles arranged to project through these openings.

Each of trucks f3 is adapted to carry a lumber stack 3T and the lumber is stacked on 4the truck in such a manner as lo prei/'ide a rertical llue Way 38. The lumber is stacked by what vis commercially known as cross-Wise piling so that when it is run into the chamber the `boards extend, transversely ot the chamber. 'lilach truck ie positioned immediately above a radiator unitl so that the space between the. stacks forms a downwardly txtemlingr tlue forming a'continuation oi the donn draft flue Atl. between vthe radiator units, and the .flue u1. ys 38 form up drattliuc ways above the radiator unit so that the heated air tromihe unit will rise through the -llue way 38, passing out between i'lic board@ ot the lumber Stack, Which are stacked iu the usual manner with stickers between the same. The airl haring been cooled in its pa# 're through the lumber slacliv'vill. by the time it 'reaches the enter side o the stack. lend to drop The downwardly proie-,cling Steam from the steam pipeal 2O cause apartalvacuum above the jets and in the down draft flue ways to accelerate the circulation ot the air and at theeame time impart'suilicient n'ioisture to the air to, provide the proper amount of humidity. ln addition to the downwardly projecting; steam jets, l. may also use the upwardly projecting steam jets in the pipes'l which.` when iu use, will the upward drait of the heated air through the liuc ways in' the lumber staclrl. 4

lt will be noted lfrom theabove described construction thatv lv provide a unit circula tion lfor each slack and that, duc to the l'act that the'iadiatru and Fteam jet units extend tranaversely ot the chamber. ll am enabled to control the lient and humidity at any point within the chamber or for any spaced apart 'to form between the downwardly between the staclre.y

radiator units extending transversely individual stack, whereby I am enabled ifi obtain a better heating control throughout the entire chambcrand the danger of the iai.' cnd of the chamber becoming chilled due to the. lack ot' siipp`ly of a proper amount oi steam to this end, as is the case irhere the radiator units extend longitudinally ot' the chamber, is obviated. ln Fig. I have illustrated a modificaiion et my invention wherein, in order to increase the circulation, I have provided battles 4G arranged partially over the top of each radiator unit and extending down; wai-div to about the bottom of the unit, whereby an open topped flue Way, enclosing the unit, is provided.

.it is obvious that with my construction, any number of radiator units'may loe used, depending of course.,l upon the length of he heating chamber.

l claim as my invention: Y.

l. A. drying apparatus, includinga chamher. .load carriers mo 'able Within andlongi rudi-nail;- ot said chamber and a plurality ot radiator units extending transversely of the chamber at the 'bottom thereof and longitudinally of thel cham ber to Aform 4between them, vertical down draft tlue nays extending transversely of llic chamber, each load carrier beingvglocated immediately above a radiator unitand supporting the material in stacks extending; transrcrs'elr ot the chamber to form between the stacks continuations of said 'transrerseliv extending down datt flue ways.

3. A drying apparatus, including a chamber, load carriers movable within and longitudinall \v oi said chamber, a plurality of radiator units extending' transversely of the chamber at the bottom thereof and spacedv apart vlongitucglinally of the chamber units` vertical down 'draft flue Vays extending transversely of the chamber. cach load carrier being located immediately above a radiator unit and supporting` the material in stacks extending' transversely ol' the chamber to form hetweeu the stacks continuations of said trans-- 'rcrsclycxtcndinfr donn draft vflue Ways and means tor individually controlling the heat ol' each radiator unit.

il. i drying apparatus, includiritir a chambei'.y load carriers morable Withinv and-longitudinall)v it said clian'iber, a plurality of of the chamber althe bottom thereof. and spaced apart longitudinally of the chamber to form betii'ceu llfeui vertical down draft flue ways ng; irausverselj.' ofthe chamber, a pluri' ol steam jet nozzles arraugedpin cach ol' s:ii l;ll11e iva-ys and ada )ted to direct the jet danimal-diy', each load carrier bein'g located immediately above a radiator unit and sul'oporting the materialv in stacks ex lll rality of radiator units, each unit` comprisa group of steam pipes extending transversely of thc chamber at the bottom there'4 of, the units being spaced apart longitudinally of ythev chamber to forni betweeii them vertical transversely extending' down draft line Ways, each load carrier being located immediately above a radiatornnit and supporting the material in stacks cxtending transversely of the chamberA to form between the stacks continuations' of said transverseljvv extending down draft flue Ways. l2. A drying apparatus, including a chamber, load carriers movable: Within and longitudinally of said chamber, a lpluralitjtv of radiator units, each unit compris ing a group of steam pipes extending trans verscly olf the chamber at the bottom thereof, and means for independently controlling the :.uhnission of steam to each group of pipes, said units being spaced apart longitudinally of the chamber to form between them vertical down draft flue ways extending transverscly of the chamber and each load carrier being located immediately above a ra iator unit and suporting the material in staf: ts extending transversely of the chamber to forni between the stacks continu-ations of said transversely extending down draft flue vvays. i lil. A drying apparatus, including a chamber, load carriers movable ivithin and lougitiuliually of said chamber, a' plurali'iyv of radiator units, each 'unit comprisingr` a mp of steam pipes extending transversely of 'the cham said units being spared apart longitudimilljv o to forni between them transversely e'xtend ing down draft flue ivys, steam pipes extending transversely of the chamber in said flue ways and having vjet nozzles arranged to project the steam downwardly, and means forcontrolling the admission of steam to said steam jet pipes independently ofeach other and independentl of the heating pipes and cach load carrier being located im mcdiatoly above a radiator unit and sup porting thel material in stacks' extending transversely of the chamber to'orrn between the stacks continuations of said transversely extending down draft fiueivays.

- it. A drying iapparatus, including a chamber, load carriers movable Within and hmgitudinally of said chamber, a'pluraiity of radiator units eheh comprising a group of steam pipes extending transversely of he chamber, said groups being spacedapart longitudinally of the chamber to form between the groups vertical transversely extending down draft flue Ways, steam pipes arranged above said groups having steam jetnonzles arranged to direct the steam up- Wardly, and means for independentlycontrolling the admission of steam to each of said groups of heat-ing pipes and to ysaid jet f the vchambermees pipes, said load carriers being located iin-` mediately `above :i radiator unit and supporting the materialv in stacks extending transversely of the chamber to form between the stacks continuatons of said traiisversely extending down dra t flue ways.

l- A drying apparatus, including a chamber, load carriers movable 'Within and longitudinally of said chamber, a plurality ofV radiator units each comprising a group of steam pipes extending transversely of the chamber, said groups being spaced apart to form between them transversely extending vertical down draft flue \vays,a steam pipe arranged in each of said flue .ways'having jet nozzles for directing'a' steam 'jet' downwardly in said flue ways, a steam pipe arranged over each of said groups having jet nozzles arranged to direct a steam jet upwardly and means Afor independently controlling-the admission of steam, to each ofl said heating groups and pipes, each load carrier being located 1mmediatcly above r. radiator .unit and sup-V porting'lthc material .in stacks extending transversely of the chamber Ato form betivcen the stacks continuations of said transversely extending down. draft flue ways.

16. A drying apparatus, including a chamber, load carriers vmovable, Within and longitudinally of said chamber, a plurality of radiator units extending transversely of the chamber at the bottom.' thereof and spaced apart longitudinally'of the chamber to form bet-Ween them vertical down draft liuc ways extending Y transversely of the chamber, each load carrier being located each of said jet immediately above-a radiator unit and sup-y porting 'the material in stacks extending ,transversely of Ithe ,chamber to form between the stacks versely extending @own draft iiuewv'ays and means for heating-the chamber at the entry thereof. l

'17. A-'Adrying apparatus,jl including .a chamber, load carriers mova i longitudinally of said chamber, the chamber at tie bottom thereof an spaced a art longitudinally of the chamber to form. etvveen them verticalrdown draft lflue Ways extending transversely of the chamber, each load carrier being'located imincdiatelyabove a radiator unit-and supporting the material "in'fstaclis extending transversely of the chamber to form between the stacks continuations of said transversely extending down draft flue ways, and means for heatingthe chamber at the exit thereof. l

18. A drying apparatus, chamber, load carriers movablewithin and longitudinally of said chamber, a plurality of radiator-ants extending transversely of the 'chamber at the bottom thereof and pmtinuations of said trans-g including a4 le Within and a plurality' of 4radiator units extending transverselyofA spaced apart iongiiudinaly of the cimmbm fw i'mm between them vertical down draft Hm? ways Ox'tendmg tizmsversely of 111e chzimiwi, zich loud culi'ici boing located iimilwiiziioiy nimm n radiator unit :mii supV poi-ting *die nmw'ini in fsiewks extending h'ansvui-sy mi' iii@ uimmwi' 10 fami be,- tweeu the stacks cviituugiiimis of said 'trimsverseiy extending dow di'iift i'ue ways,

and moans for hunting Hic chamber ai its entry and vxt. y

In witns whereof, I 'DONALD R. BREW 511.112, have hereunto sei; my hand at Indianapolis, Indiana7 this 2nd. day yof Miizch, A. D. one4 .thousand nine hunched and twentyfoul'.

DONALD iz. BREWSTER. 

